static void clear_stats(int fd)
{
unsigned int nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
__u64 values[nr_cpus];
__u32 key;
memset(values, 0, sizeof(values));
for (key = 0; key < SLOTS; key++)
bpf_update_elem(fd, &key, values, BPF_ANY);
}
int main (int ac, char **argv)
{
if (ac != 3) {
printf("Usage: master <module.bpf> <map_path>\n");
return -1;
}
char filename[256];
int sock;
snprintf(filename, sizeof(filename), "%s", argv[1]);
if (load_bpf_file(filename)){
printf("%s", bpf_log_buf);
return 1;
}
/* Initializing our map with key val pair ( IPPROTO_ICMP,0) */
int key = IPPROTO_ICMP;
long value = 0;
int ret = bpf_update_elem(map_fd[0], &key, &value, BPF_ANY);
if (ret != 0) {
printf("Failed to add key-value pair: %s\n",strerror(errno));
return -1;
}
sock = open_raw_sock("lo");
assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd,
sizeof(prog_fd[0])) == 0);
/* Persisting map */
assert(bpf_obj_pin(map_fd[0],argv[2]) == 0);
printf("MAP persisted to %s\n", argv[2]);
// Pinging to localhost
FILE * f = popen("ping -c5 localhost", "r");
(void) f; //Suppress unused variable warning from compiler
long icmp_cnt = 0;
char q;
while (q != 'q') {
assert(bpf_lookup_elem(map_fd[0], &key, &icmp_cnt) == 0);
printf("ICMP Count %ld | Enter 'q' to quit: ", icmp_cnt);
q = getchar();
}
return 0;
}
int main (int ac, char **argv)
{
if (ac != 3) {
printf("Usage: master_host <module.bpf> <prog_path>\n");
return -1;
}
char filename[256];
snprintf(filename, sizeof(filename), "%s", argv[1]);
if (load_bpf_file(filename)){
printf("%s", bpf_log_buf);
return 1;
}
int key = 0;
int fd = bpf_obj_get(argv[2]);
if (fd < 0) {
printf("Failed to load container module %s\n", argv[2]);
return -1;
}
int ret = bpf_update_elem(map_fd[0], &key, &fd, BPF_ANY);
if (ret != 0) {
printf("Failed to add key-value pair %s\n", strerror(errno));
return -1;
}
int sock = open_raw_sock("lo");
assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd,
sizeof(prog_fd[0])) == 0);
FILE *f = popen("ping -c5 localhost", "r");
(void) f;
char q;
while (q != 'q') {
printf("Enter 'q' to exit\n");
q = getchar();
}
return 0;
}
static void
update_elem(int key, unsigned long value) {
if (bpf_update_elem(mapfd, &key, &value, 0)) {
fail("bpf_update_elem failed '%s'\n", strerror(errno));
}
}
int main(int ac, char **argv)
{
int serverfd, serverconnfd, clientfd;
socklen_t sockaddr_len;
struct sockaddr serv_addr, mapped_addr, tmp_addr;
struct sockaddr_in *serv_addr_in, *mapped_addr_in, *tmp_addr_in;
char filename[256];
char *ip;
serv_addr_in = (struct sockaddr_in *)&serv_addr;
mapped_addr_in = (struct sockaddr_in *)&mapped_addr;
tmp_addr_in = (struct sockaddr_in *)&tmp_addr;
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
if (load_bpf_file(filename)) {
printf("%s", bpf_log_buf);
return 1;
}
assert((serverfd = socket(AF_INET, SOCK_STREAM, 0)) > 0);
assert((clientfd = socket(AF_INET, SOCK_STREAM, 0)) > 0);
/* Bind server to ephemeral port on lo */
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr_in->sin_family = AF_INET;
serv_addr_in->sin_port = 0;
serv_addr_in->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
assert(bind(serverfd, &serv_addr, sizeof(serv_addr)) == 0);
sockaddr_len = sizeof(serv_addr);
assert(getsockname(serverfd, &serv_addr, &sockaddr_len) == 0);
ip = inet_ntoa(serv_addr_in->sin_addr);
printf("Server bound to: %s:%d\n", ip, ntohs(serv_addr_in->sin_port));
memset(&mapped_addr, 0, sizeof(mapped_addr));
mapped_addr_in->sin_family = AF_INET;
mapped_addr_in->sin_port = htons(5555);
mapped_addr_in->sin_addr.s_addr = inet_addr("255.255.255.255");
assert(!bpf_update_elem(map_fd[0], &mapped_addr, &serv_addr, BPF_ANY));
assert(listen(serverfd, 5) == 0);
ip = inet_ntoa(mapped_addr_in->sin_addr);
printf("Client connecting to: %s:%d\n",
ip, ntohs(mapped_addr_in->sin_port));
assert(connect(clientfd, &mapped_addr, sizeof(mapped_addr)) == 0);
sockaddr_len = sizeof(tmp_addr);
ip = inet_ntoa(tmp_addr_in->sin_addr);
assert((serverconnfd = accept(serverfd, &tmp_addr, &sockaddr_len)) > 0);
printf("Server received connection from: %s:%d\n",
ip, ntohs(tmp_addr_in->sin_port));
sockaddr_len = sizeof(tmp_addr);
assert(getpeername(clientfd, &tmp_addr, &sockaddr_len) == 0);
ip = inet_ntoa(tmp_addr_in->sin_addr);
printf("Client's peer address: %s:%d\n",
ip, ntohs(tmp_addr_in->sin_port));
/* Is the server's getsockname = the socket getpeername */
assert(memcmp(&serv_addr, &tmp_addr, sizeof(struct sockaddr_in)) == 0);
return 0;
}
